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The sensitivity accuracy of an instrument depends on-
1. Frequency response
2. Amplitude distortion
3. Temperature variations
4. Hysteresis

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Correct Answer - Option 3 : Temperature variations

Explanation:

The static performance parameters of the instruments are:

  1. Accuracy
  2. Precision
  3. Resolution
  4. Threshold
  5. Static sensitivity
  6. Linearity
  7. Hysteresis
  8. Backlash
  9. Dead band
  10. Drift

Accuracy: It is the closeness with which an instrument reading approaches the true value of the quantity being measured. It means conformity to truth.

Precision: It is defined as the ability of the instrument to reproduce a certain set of readings within a given accuracy

Drift: It is defined as the variation of output for a given input caused due to change in the sensitivity of the instrument to certain interfering input like temperature changes, component instability, etc.

Resolution: It is defined as the smallest increment in the measured value that can be detected with certainty by the instrument.

Threshold: It is defined as the minimum value of input below which no output can be detected.

Static sensitivity: It is defined as the ratio of the magnitude of response to the magnitude of the quantity being measured.

Linearity: It represents that output of the instrument which is a linear function of the input.

Hysteresis: It is defined as the magnitude of error caused in the output for a given value of input when this value is approached from opposite directions, i.e. from ascending order and then descending order.

Dead band: It is defined as the largest change of the measurand to which the instrument does not respond.

Backlash: It is defined as the maximum distance or angle through which any part of the mechanical system may be moved in one direction without causing motion of the next part.

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